Q:
I'm looking for a direct replacement handlebar for a 2003 sportster that has the original factory buckhorns. I want to change to black but not have to change any wiring or cables/brakeline.
A:
In order to figure out if which bars will work on your particular model you could measure your existing bars { height , width and pullback } and then go to the listing for the bars you are interested in and compare your stock measurements to the dimensions shown in the dimensional drawing at the new bars . If they are close you should be ok . If not then you would need new throttle and idle cables , clutch cable and brake line along with extending the wiring for the switches
try this set https://www.lowbrowcustoms.com/collections/motorcycle-handlebars/products/biltwell-chumps-8-handlebars-1-black
maybe they will work